Does the CYUSB3014-BZXC IC support USB3.1 Gen1 standard? We have tried the sample code, Cyfxisosrcsink, and works with USBbcd 3.0. However, we changed the USBbcd to 3.1, but it doesn't work(streamer can't receive data from device anymore), Do Cypress have any suggestion?

I tested the above-attached USBIsoSourceSink firmware with Win 7 and Win 10 OS PC's, unfortunately, I couldn't test with Win 8 PC. I can see device enumerated well and streamer app is streaming well on both Win 7 and 10.

Can you do the following test and share the screen shot of it.

After loading the attached firmware to CYUSB3KIT-003, select the device in Control Center and then click on Descriptor info in the Control Center and share the screenshot of it.

Can you share the firmware that you used for testing? I will test here for confirmation.

I tried with the attached BulkSrcSink_1 and can see streamer is streaming at low speed. This issue has fixed in the latest drivers, i.e provided with Type C PD Analyzer here http://www.cypress.com/documentation/development-kitsboards/cy4500-ez-pd-protocol-analyzer This is 1.2.3.17 version. Download this application and bind FX3 to this and check with the streamer. Do restart if required. And one small correction in the example firmware, the bcdUSB should be 0x10, 0x03 instead of 0x01, 0x03 which is shown below.